Change-speed gearing.



L. PETERSON. CHANGE SPL-ED GEARING. APPLICATION FILED MAY2V,1912.

Patented J an. 21, 1913.

IIIIIIIIJIIIIIIIIIIH "wf/WM` me@ vwl L. A. PETERSON. CHAN'GE SPEEDGEARING.

APPLICATION FILED MAM?. 1912.

Patented M1121, 1913.

mmm@

4 SHEETS-SHEET 2.

L. A. PETERSON. CHANGE SPEED GEARING.

vAPPLICIATION FILED MAY Z7, 1,912. LLQ,

FGM

Patented Jan. 21, 1913.

4 SHEETS-SHEET 3.

L. A. PETERSON. CHANGE SPEED GEARING. APPLICATION FILED MAY 27, 1912.

Patented Jan. 21, 1913.

4 SHEETS-SHEET 4,

' kind which can readily -shaft is adapted to engage a -axial gears,-one by one, on another shaft so Lans AUGUST PETERSON, or STOCKHOLM,

SWEDEN.

CHANGE-SPEED GEARING.

Specification of Letters Patent.

.Patentedelfan. 21, 19l3..

Application. filed May 27, 1912. Serial No. 700,114.

To all whom it may concern:

Be it known that l, LAKS AAUGUST PETER- soN, a subject of the King ofSweden, residing at Stockholm, in the Kingdom of Sweden, have invented anew and useful Change-Speed Gearing, of which the following is aspecification.

The invention relates to a change-speed gearing for automobiles, thelike and particularly of the kind where a gear fixed on a swinging andextensible series of coas to rotate this shaft at different speed.

The object is to simplify and solidify the construction and to afford agearing of this be applied with great advantage and without considerablechange of parts to automobiles now in use.

According to the' present invention said swinging and extensible shaftis mounted in an arm which swings on and is slidable along a fixed shaftand actuated b y a spring, the arm having a stud or projection which isadapted to engage recesses on a fixed plate curved and concentric withthe fixed shaft so as to adjust the arm and keep it in the properworking positions with or without the aid of a movable locking plate.

One end of the swinging shaft is connected to a driving shaft by auniversal joint and the other end has a bearing in the arm, the shaftbeing adapted to rotate but not to move endwise relatively the bearing.The shaft may have another universal joint near the bearing so as tion,which is placed in the bearing, being kept parallel to the drivingshaft. Tf only one universal joint is used the bearing must be swingablenot-only with the arm but also relatively to the arm. When two universaljoints are used the bearing is not shiftable relatively to the arm.

Tn the drawings, which show Van example with two universal joints,Figure-1 is a vertical longitudinal sectional view, partly in section.Fig. 2 is a horizontal sectional view partly in elevation with the topor lid of the casing removed. Fig. 3 vertical cross section. Fig. 4: endview partly in section. Figs. 5-8 show details; Figs. 6 and 7 to alarger scale.

The motor shaft 1 drives, by means of the common cone coupling 2, 3 theshaft 4,`which by lmeans of the clutch coupling 5 drives the vso as toexclude dust. B'

motor boats and y to admit of the end p or` which has shaft 7. Thisshaft has bearing in the one end of casing 6 which incloses the gearinguniversal joint 8 the shaft 7 is connecte to an extensible shaft. Thisconsists ofI two parts 9, 10 which are movable along each other andcooperate by means of slot and key so as t0 partake in the rotation. Byuniversal joint 11 the part 10 is connected toa shaft 12 which hasbearings in the arm a. This arm has a long nave b which is'passed on afixed shaft e so thatthe arm can move along said shaft and also swingaround it. Keyed on the free end of shaft 12 is a gear or pinion 13which is adapted to engage, one by one, the gears 17 fixed coaxially ona shaft 15. This shaft has bearings in the end of casing 6 and transmitsmotion to an automobile or boat in any well known manner.

A spiral spring f, passed on the nave b and engaging the arm a (at 86)and the shaft c or another fixed part (at 85) moves the arm a to theleft of Fig. l so as to extend the shaft 910, and swings the arm a tothe right of Fig. 3 so that the pinion 13 will engage one of thepositions of pinions 13 1s obtained and maintained by a radial stud (lon arm a whic engages a slot in a fixed plate h which is curved andcoaxial with the fixed shaft c. The plate h has four such recesses 21,24, 25, 27 in the left edge (Fig. 2) of an opening 18 in said plate, andthese recesses correspond to the four working positions of pinion 13 fordriving forward, the concentric gears 17 of shaft 15 being four innumber in the instance shown in the drawing. en the stud d rests on thebottom of recess 21 the pinion 13 engages the central gear 17 the samediameter as pinion 1 so as to be driven with the same speed. The

`other gears 17 are larger and impart reduced speeds.

To move and swing the arm a against the pressure of spring f levers orpedals may be used, Which should be connected with the common `ii'zlutchso as to open the clutch before disengaging the pinion 13. In theinstance illustrated on the drawing a pedal a' and a lever j are shown.Movement of the pedal will swing the arm a to the left, Fig. 3, so as todisengage the pinion 13 from the gears 17. The lever j is adapted tomove the arm a and thereby the pinion 13 in axial direction. For thispurpose the lever en gages a rod m movable lengthwise in a guide 61 andrigidlyconnected to a curved plate n, which slides in axial guides 62and has a slot @which engages the stud al.

The connection between pedal z and arm a consists of a link t, a crankshaft 64, with cranks u and o (said shaft being mounted in uprights 63on the casing 6), a rod w movable lengthwise in a guide 65 and a steelband Z guided by a roller 7c and connected to arm a at 89.

The forked lower end of pedal z' engages a stud or studs 30 on a ring 31which engages an annular groove on shaft 4 so -as to release the clutchmember 3. The connection between pedal z' and arm a should beadjusted'so that the member 3 is released erethe arm a is pulled. Forthis purpose the band Z is connected to a nut 35 screwed on a threadedportion ofl rod lw so as to adjust by rotating the rod, a nut 37 servingas lock for nut 35. A screw pin 67 engaging a groove 68 on rod 'wprevents rotation of the rod after the adjustment is done. Or the link tmay consist of two parts connected by a ri htand linkthreaded nut 66 soas to e ect the adjustment by rotating said nut.

The rod m is screwed into a nut 69 so'as to adjust the connectionbetween lever j and plate n by rotating the rod.

-To bring the pinion 13 from one gear 17 to another the arm a should beKmoved both axially and sidewise, andthe pedal should be actuated atfirst so as to open the clutch before disengaging the pinion. The springf keeps the stud d in position in the recesses 21, 24, 25, 27 so as tokeep the pinion 13 engaged with the gears 17. The right edge of opening18 has two recesses 28, 29, Fig. 5, for the stud d, corresponding to theresting and backing positions. In these recesses the stud d is held bythe movable late n, which prevents axial movement, t to prevent movementin peripheral direction. The plate n is locked in desired position bymeans of the usual `bolt (not shown) mounted on lever j and adapted toengage the notches on the fixed segment 39. In Figs. 1 and 2 the pinion13 is in the resting position. When stud d has the posit-ion shown inFig. 5, the pinion 13 eligages the third :gear 17.

If the spring f be mounted so as to only swing the arm a and not to moveit axially, projections 19 'Fi 2, may be formed on plate 7L at each othe recesses 24, 25 so as to guide the stud d on both sideswhen it ismoving into said recesses. When using a weak spring f, which is not ableto keep the pinion engaged without failure, a curved locking plate 40(shown in Fig. 5 and separately in Fig. 5") may be used for preventingundesired disengagement. This e recesses being adapted plate should bemovable axially and may be placed' for instance betweenplates la and. nso as to be guided along the edges of the guides 62 and may be connectedto rod w for instance between two nuts which jam a lug `8l of the platepassed on rod fw. If not otherwise guided the plate may have another lug82 adapted to slide on rod m. A spring (not shown) tends to push theplate in locking position. In such position the edges 22, 23 and 26obstruct the passage of stud d when said stud occupies the recesses 24,25, 27, so that disengagement is impossible, unless the locln'ng plate40 be withdrawn by actuating the pedal. As

lthe disengagement is effected by the same pedal, the length of band lshould beadjusted so as to become slack in the resting position to suchan extent that the plate 40 be withdrawn ere the band is strained.

The backing is rendered possible by using an intermediate. gear 4l. Thisis mounted in a forked arm 43 extendin radially from Lthe xed shaft cand adapted to engage the pinion 13 and the largest gear 17. The arm 43`swings on an axial stud 44 on end of shaft c and is pressed against aixed stop 49 byfmeans of a spring 45 so as to normally keep the gear 41disengaged from ear 17.1..--5- g The plate 7L is fixed to a flange. 62on a curved support e by screws 71 oi the like. The ends 46 of saidsupport are forked and are anchored by bolts 74. The shaft c is fixedinA supports 47, which are anchored by bolts 75.

The roller 7c is mounted in the forked end .of a pivot 87, which jhasbearing in a projection 88 of the guide 62, so that the roller Ycanadjust its position according to the varyingdirection of band l.

One end of spring f beingconnected to a jam-ring 48, Fig. 1, the tensionof the spring may be adjusted both axlally and circularly by moving thering along the shaftV e and by rotating it on said shaft.

When throwing the pinion 13 into engagement with a larger gear 17 whilethe automobile is running, it may happen that this' gear, because of itsgreater peripheral speed at first operates on the pinlon and .on theclutch member 3 connected therewith, so

lthat the pinion will momentarily check the causing a jerk or jog. Figs.6 and construction vadapted to avoid this Here the pinion has a looseactuated by rlctional dogs pivots 5l and engaging the inner smooth sideof rim 53 either from cen.- trifugal force or from the action of springs59 entering recesses 58, the dogs being so measured in length that theyform an angle with a radius passing through their pivots so as to beablerto yield when the rim 53 tends to rotate with higher speed than therunnin-g, 7 show a inconvenience.

rim 53 which is 52 swingable on 'tti .eral groove on the body of intactal m shaft 12. rl`he dogs are placed in a periphpinion 13 and may alsoenter an inside groove on rim 53 if desired. A nut 54 screwed on acentral stud on said body keeps the pivots and rim in place. A stud 55on oneof the pivots enters a hole in the'nut so as to preventunsorewing,

a springf57 keeping the stud in engagement With said hole. The holes 56facilitate de tachment of the rim with the aid of a keyv having pinsadapted to enter said holes so as to bring the dogs in the dottedpositions, Fig. 7, When the rim is rotated. The springs 59 may be commonfor two dogs as shown. Fig. 8 shows a shaft provided With a similardevice, so that one part of the shaft is` allowed to rotate-With greaterspeed than the other. The two parts of the shaft are shown connected bya flanged nut 60.

The

' comprising a section held to a fixed axis of rotation, a secondsection composed. of axially extensible shaft members keyed to eachother against independent rotation, a universal joint connecting oneshaft member with said first section, a third shaft section having auniversal connection with the remaining shaft member of said secondsection, a driving pinion on said third section, and a bearing mechanismaxially and rotativelyx shiftable about a fixed axis for supporting saidthird section and engaging the pinion thereof with said gears,substantially as described.

2. A change speed gear mechanism comprising in combination, a pluralityof gears of different sizes, a driving shaft comprising a section heldto a fixed axis of rotation, a second and axially extensible sectionhaving a universal connection with said rst section, a third sectionhaving a universal connection with said second section, a pinion on saidthird section, and bearing mechanism axially and rotatively adjustableabout a fixed axis for supporting said third section and engaging thepinion thereof with any one of said gears, substantially as described.

3. A change speed gear mechanism comprisi in combination, a plurality ofgears of di erent sizes, a driving shaft comprising a section held to afixed axisof rotation, a second and axially extensible section havinguniversal connection with said first section,

gears or rims 17 are ixed on a step! disk 16 by bolts or the like so asto admit of a third section having universal connection with said secondsection, -a pinion on said third section, a bearing mechanism axiallyand rotatively adjustable about a fixed axisV y and supporting saidthird section, and a spring for axially and rotatively moving saidmechanism', substantially as described.

4. A change speed gear mechanism oomprising in combination, a pluralityof gears,

a driving shaft composed of rst, second and third sections havinguniversal connection with each other, a driving pinion on the thirdsection, means for shifting the third section laterally and axially toengage the pinion with any one of said gears, said means having a stud,and a member provided With recesses for locking said stud to hold saidpinion ,in mesh with the selected gear, substantially as described.

5. A change speed gear mechanism comprising in combination, a pluralityof gears, a driving shaft, a pinion on said' shaft, bearing mechanismfor said shaft movable axially and rotatively about a xed axis andhaving a slot engaging portion, a slidably mounted member provided Witha slot receiving said portion and arranged and disposed to permitrotative movement of said mechanism, and means for sliding said memberto shift said mechanism axially, substantially as described.

6. A change speed gear mechanism comprising in combination, a pluralityof gears, a driving shaft, a pinion on said shaft, bearing mechanism forsaid shaft movable axially and rotatively about a fixed axis and havi astud, a slidably mounted curved plate aving the center of its curvatureco incident With the axis of said mechanism and provided With a slot forreceiving the stud of said mechanism to permit rotative adjustment ofthe mechanism, means for rotatively shifting said'mecha'nism, and meansengaging said plate to slidethe same and axially shift said mechanism toengage said pinion with any one of said gears, substantially asdescribed.

7. A change speed gear mechanism comprisin in combination, a pluralityof gears, a driving shaft and a pinion thereon, means for shifting saidshaft to engage the pinion with any one of said gears, and devicesconnecting the drive shaft and pinion to rotate the pinion at a speedequal to the shaft and permit free rotation of the pinion in onedirection at a speed exceeding the speed of the shaft, substantially asdescribed.

8. A change speed gear mechanism comprising in combination, a pluralityof gears, a driving shaft, a inion on said shaft, a fixed shaft, areversing or intermediate gear movably mounted onosaid fixed shaft inthe plane 'of one of said gears adapted to be moved. into meshengagement therewith, a bearing for said drive shaft axially androtatively shiftable on said. fixed shaft, and name to thisspecification in the presence of devices for axially and rotativelyshiftinlg1 two subscribing Witnesses.V said bearing to bring said pinioninto mes with an; one of. said first named gears or LABS AUGUSTPETERSON' 5 with said reversing gear, substantlally as Witnesses:

described. R. LARssoN,

In testimony whereof I have signed my L. ANDERSON.

